Mitt Romney’s tone on climate change appear to be evolving as he considers a third presidential run — something that was evident during a speech he made Wednesday night in Salt Lake City, Utah.

“I’m one of those Republicans who thinks we are getting warmer and that we contribute to that,” he said, according to the Associated Press, adding that federal leaders need to do more to stem the problem.

This declaration, made at an investment management conference in Utah on Wednesday night, is a change in tone for Romney as he emphasized possible human influence on climate change and world leaders’ ability to take action to stop it.